Implement the plugin side of the GUI functions

src/common/serialization/clap/plugin.cpp

@@ -17,6 +17,7 @@
 #include "plugin.h"
 
 #include <clap/ext/audio-ports.h>
+#include <clap/ext/gui.h>
 #include <clap/ext/latency.h>
 #include <clap/ext/note-ports.h>
 #include <clap/ext/params.h>
@@ -81,9 +82,10 @@ const clap_plugin_descriptor_t* Descriptor::get() const {
     return &clap_descriptor;
 }
 
-std::array<std::pair<bool, const char*>, 6> SupportedPluginExtensions::list()
+std::array<std::pair<bool, const char*>, 7> SupportedPluginExtensions::list()
     const noexcept {
     return {std::pair(supports_audio_ports, CLAP_EXT_AUDIO_PORTS),
+            std::pair(supports_gui, CLAP_EXT_GUI),
             std::pair(supports_latency, CLAP_EXT_LATENCY),
             std::pair(supports_note_ports, CLAP_EXT_NOTE_PORTS),
             std::pair(supports_params, CLAP_EXT_PARAMS),

src/common/serialization/clap/plugin.h

@@ -115,6 +115,7 @@ struct Descriptor {
 struct SupportedPluginExtensions {
     // Don't forget to add new extensions to below method
     bool supports_audio_ports = false;
+    bool supports_gui = false;
     bool supports_latency = false;
     bool supports_note_ports = false;
     bool supports_params = false;
@@ -125,11 +126,12 @@ struct SupportedPluginExtensions {
      * Get a list of `<bool, extension_name>` tuples for the supported
      * extensions. Used during logging.
      */
-    std::array<std::pair<bool, const char*>, 6> list() const noexcept;
+    std::array<std::pair<bool, const char*>, 7> list() const noexcept;
 
     template <typename S>
     void serialize(S& s) {
         s.value1b(supports_audio_ports);
+        s.value1b(supports_gui);
         s.value1b(supports_latency);
         s.value1b(supports_note_ports);
         s.value1b(supports_params);